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參數(shù)資料
| 型號： | AD7701AR |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 16/20頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ADC 16BIT LC2MOS 20-SOIC |
| 標準包裝： | 1 |
| 位數(shù)： | 16 |
| 采樣率（每秒）： | 4k |
| 數(shù)據(jù)接口： | 串行 |
| 轉換器數(shù)目： | 1 |
| 功率耗散（最大）： | 37mW |
| 電壓電源： | 模擬和數(shù)字，雙 ± |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 20-SOIC（0.295"，7.50mm 寬） |
| 供應商設備封裝： | 20-SOIC W |
| 包裝： | 管件 |
| 輸入數(shù)目和類型： | 1 個單端，單極；1 個單端，雙極 |
REV. E
AD7701
–5–
PIN FUNCTION DESCRIPTIONS
Pin No.
PDIP,
CERDIP,
SOIC
SSOP
Mnemonic Description
11
MODE
Selects the Serial Interface Mode. If MODE is tied to –5 V, the AD7701 will operate in
the Asynchronous Communications (AC) mode. The SCLK pin is configured as an
input, and data is transmitted in two bytes, each with one start bit and two stop bits. If
MODE is tied to DGND, the Synchronous External Clocking (SEC) mode is selected.
SCLK is configured as an input, and the output appears without formatting, the MSB
coming first. If MODE is tied to +5 V, the AD7701 operates in the Synchronous
Self-Clocking (SSC) mode. SCLK is configured as an output, with a clock frequency of
fCLKlN/4 and 25% duty cycle.
22
CLKOUT
Clock Output to Generate an Internal Master Clock by Connecting a Crystal between
CLKOUT and CLKIN. If an external clock is used, CLKOUT is not connected.
33
CLKIN
Clock Input for External Clock.
4, 17
4, 25
SC1, SC2
System Calibration Pins. The state of these pins, when CAL is taken high, determines
the type of calibration performed.
55
DGND
Digital Ground. Ground reference for all digital signals.
68
DVSS
Digital Negative Supply, –5 V Nominal.
6, 7, 9, 11,
NC
No Connect.
18, 21, 22, 23
710
AVSS
Analog Negative Supply, –5 V Nominal.
812
AGND
Analog Ground. Ground reference for all analog signals.
913
AIN
Analog Input.
10
14
VREF
Voltage Reference Input, 2.5 V Nominal. This determines the value of positive full scale
in the Unipolar mode and of both positive and negative full scale in Bipolar mode.
11
15
SLEEP
Sleep Mode Pin. When this pin is taken low, the AD7701 goes into a low power mode
with typically 10
W power consumption.
12
16
BP/
UP
Bipolar/Unipolar Mode Pin. When this pin is low, the AD7701 is configured for a uni-
polar input range going from AGND to VREF. When Pin 12 is high, the AD7701 is
configured for a bipolar input range,
±VREF.
13
17
CAL
Calibration Mode Pin. When CAL is taken high for more than four cycles, the AD7701
is reset and performs a calibration cycle when CAL is brought low again. The CAL pin
can also be used as a strobe to synchronize the operation of several AD7701s.
14
19
AVDD
Analog Positive Supply, +5 V Nominal.
15
20
DVDD
Digital Positive Supply, +5 V Nominal.
16
24
CS
Chip Select Input. When
CS is brought low, the AD7701 will begin to transmit serial
data in a format determined by the state of the MODE pin.
18
26
DRDY
Data Ready Output.
DRDY is low when valid data is available in the output register. It
goes high after transmission of a word is completed. It also goes high for four clock
cycles when a new data-word is being loaded into the output register, to indicate that
valid data is not available, irrespective of whether data transmission is complete or not.
19
27
SCLK
Serial Clock Input/Output. The SCLK pin is configured as an input or output, depen-
dent on the type of serial data transmission that has been selected by the MODE pin.
When configured as an output in the Synchronous Self-Clocking mode, it has a fre-
quency of fCLKIN/4 and a duty cycle of 25%.
20
28
SDATA
Serial Data Output. The AD7701’s output data is available at this pin as a 16-bit serial
word. The transmission format is determined by the state of the MODE pin.
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| AD7701AR-REEL | 制造商:Rochester Electronics LLC 功能描述:- Tape and Reel |
| AD7701ARS | 功能描述:IC ADC 16BIT LC2MOS MONO 28-SSOP RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉換器 系列:- 標準包裝:1 系列:- 位數(shù):14 采樣率（每秒）:83k 數(shù)據(jù)接口:串行，并聯(lián) 轉換器數(shù)目:1 功率耗散（最大）:95mW 電壓電源:雙 ± 工作溫度:0°C ~ 70°C 安裝類型:通孔 封裝/外殼:28-DIP（0.600"，15.24mm） 供應商設備封裝:28-PDIP 包裝:管件 輸入數(shù)目和類型:1 個單端，雙極 |
| AD7701ARS-REEL | 功能描述:IC ADC 16BIT LC2MOS MONO 28-SSOP RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉換器 系列:- 標準包裝:1 系列:- 位數(shù):14 采樣率（每秒）:83k 數(shù)據(jù)接口:串行，并聯(lián) 轉換器數(shù)目:1 功率耗散（最大）:95mW 電壓電源:雙 ± 工作溫度:0°C ~ 70°C 安裝類型:通孔 封裝/外殼:28-DIP（0.600"，15.24mm） 供應商設備封裝:28-PDIP 包裝:管件 輸入數(shù)目和類型:1 個單端，雙極 |
| AD7701ARSZ | 功能描述:IC ADC 16BIT LC2MOS MONO 28SSOP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉換器 系列:- 標準包裝:1 系列:- 位數(shù):14 采樣率（每秒）:83k 數(shù)據(jù)接口:串行，并聯(lián) 轉換器數(shù)目:1 功率耗散（最大）:95mW 電壓電源:雙 ± 工作溫度:0°C ~ 70°C 安裝類型:通孔 封裝/外殼:28-DIP（0.600"，15.24mm） 供應商設備封裝:28-PDIP 包裝:管件 輸入數(shù)目和類型:1 個單端，雙極 |
| AD7701ARSZ-REEL | 功能描述:IC ADC 16BIT LC2MOS MONO 28SSOP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉換器 系列:- 標準包裝:1,000 系列:- 位數(shù):12 采樣率（每秒）:300k 數(shù)據(jù)接口:并聯(lián) 轉換器數(shù)目:1 功率耗散（最大）:75mW 電壓電源:單電源 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:24-SOIC（0.295"，7.50mm 寬） 供應商設備封裝:24-SOIC 包裝:帶卷 (TR) 輸入數(shù)目和類型:1 個單端，單極；1 個單端，雙極 |
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